Air Force Lt. Gen. Stanley E. Clarke III, the director of the Air National Guard, addresses an audience during the Air Force Association's Air and Space Conference and Technology Exposition, Sept. 18, 2013, at National Harbor, Md. The conference is design

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Air Force Lt. Gen. Stanley E. Clarke III, the director of the Air National Guard, addresses an audience during the Air Force Association's Air and Space Conference and Technology Exposition, Sept. 18, 2013, at National Harbor, Md. The conference is designed to bring together the leaders, defense industry experts, academia and specialists from around the world to discuss the issues and challenges facing the and aerospace community today.

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